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Intermediate SQL
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Cursusinhoud

Intermediate SQL

Intermediate SQL

1. Grouping
GROUP BY ClauseOrder of StatementsChallenge: Total Ride Time for Each Subway LineAverage Student's Grade ChallengeSearching for the Top Math Students ChallengeHAVING ClauseSeveral Aggregate Functions in the QueryMore Complex Filtering
2. Nested Subqueries
Nested QueriesChallenge: Non-tech Department EmployeesUsing Inner Subqueries in the FROM SectionChallenge: Employees With More Than Average SalaryUNION ClauseChallenge: Combining Table Results
3. Joining Tables
JOIN 2 TablesChallenge: Get Category By Product PriceChallenge: Get Minimum Price By CategoryChallenge: Get Product Amount By CategoryLEFT, RIGHT and INNER JOINsChallenge: Table JoinChallenge: FULL JOIN Usage
4. DDL and DML in SQL
CREATE and ConstraintsALTER and INSERT OperationsDROP and TRUNCATEUPDATE and DELETE

book
Challenge: Non-tech Department Employees

In this chapter, you will work with the employees and department tables.

Taak

Swipe to start coding

Your task is to retrieve the first name, last name, and salary of those employees who work in non-technical departments.

To do this, use an inner query where you write the filtering using a WHERE clause.

You also need to sort the results by salary, from highest to lowest. Use the ORDER BY clause to accomplish this subtask.

Brief Instructions

  • Retrieve the first_name, last_name, and salary columns from the employees table.
  • In the WHERE clause, use a nested query with the syntax WHERE department IN.
  • In the nested query, select the name column from the department table.
  • In the nested query, use the WHERE clause to set type = 'non-tech'.
  • Sort the results by salary in descending order.

Oplossing

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Was alles duidelijk?

Hoe kunnen we het verbeteren?

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Sectie 2. Hoofdstuk 2
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book
Challenge: Non-tech Department Employees

In this chapter, you will work with the employees and department tables.

Taak

Swipe to start coding

Your task is to retrieve the first name, last name, and salary of those employees who work in non-technical departments.

To do this, use an inner query where you write the filtering using a WHERE clause.

You also need to sort the results by salary, from highest to lowest. Use the ORDER BY clause to accomplish this subtask.

Brief Instructions

  • Retrieve the first_name, last_name, and salary columns from the employees table.
  • In the WHERE clause, use a nested query with the syntax WHERE department IN.
  • In the nested query, select the name column from the department table.
  • In the nested query, use the WHERE clause to set type = 'non-tech'.
  • Sort the results by salary in descending order.

Oplossing

Switch to desktopSchakel over naar desktop voor praktijkervaringGa verder vanaf waar je bent met een van de onderstaande opties
Was alles duidelijk?

Hoe kunnen we het verbeteren?

Bedankt voor je feedback!

Sectie 2. Hoofdstuk 2
Switch to desktopSchakel over naar desktop voor praktijkervaringGa verder vanaf waar je bent met een van de onderstaande opties
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